jquery function on dropdown select

Try this one, Demo on JsFiddle

$('select[name="dropdown"]').change(function() {
    alert($(this).val());

});

Try this demo http://jsfiddle.net/JGp9e/

This will help, have a nice one!

code

$('select[name="dropdown"]').change(function(){

    if ($(this).val() == "2"){
        alert("call the do something function on option 2");
     }        
});​

HTML

<select name="dropdown" size=1>
    <option value="1">option 1</option>
    <option value="2">option 2</option>
</select>​

use

$("#idofselectbox").change(function(){
// your code here
});

hope this helps....

$(document).ready(function() {
  $("select[name='dropdown']").change(function() {
     alert($(this).val());
  });
});